US2987165A - Bucket conveyor - Google Patents

Description

June

6, 1961 R. T. SHEEHAN 2,987,165

BUCKET CONVEYOR Filed May 27, 1957 2 Sheets-Sheet l IN V EN TOR. Wo Tff June 6, 1961 R. T. sHEEHAN 2,987,165

BUCKET coNvEyoR Filed May 27, 1957 2 Asnags-sheet 2 Filed May 27, 1957, Ser. No. 661,820 4 Claims. (Cl. 198-140) This invention relates to conveyors and, in particular, to bucket conveyors.

One object of this invention is to provide a bucket conveyor having an improved and simplified construction for mounting the buckets upon the conveyor chains and rendering the buckets quickly and easily interchangeable for repairs or replacement.

Another object is to provide a bucket conveyor having a simple and effective means for closing the gaps between adjacent buckets so as to prevent loss of materials by falling through such gaps, as well as causing wear and other damage to the conveyor chains, sprockets, shafts and bearings by the abrasive effect thereon of such materials.

Another object is to provide a bucket conveyor which has a minmum of moving parts, is free from piano hinges, and which is so constructed and arranged that each bucket completely dumps its load and moves entirely out of `the way before the next succeeding bucket arrives atfthe dumping point and dumps its respective load.

Another object is to provide a bucket conveyor which is of universal application in that the buckets can be vused to convey substantially any kind of material whether solids, liquids, powders, grains, chemicals, chips, stamping scrap from stamping presses, flash from forging presses, hot sand from foundry shakeouts, corrosive materials whether alkaline or acid, and many other substances both hot and cold.

Another object is to provide a bucket conveyor which gives an even-metered flow of conveyed materials or articles, which enables such articles to straddle buckets without Yfalling between them, and which gives a troughing effeet without deformation.

Other objects and advantages of the invention will become apparent during the course of the following description of the accompanying drawings, wherein:

FIGURE l ,is a top plan view of a bucket conveyor according to one form of the invention, with the central portion thereof broken away to conserve space and enable the showing of the invention upon a larger scale;

FIGURE 2 is a side elevation of the bucket conveyor ,shown in FIGURE l;

FIGURE 3 is a vertical cross-section taken along the line 3-.3 in JFIGURE 2 showing the bucket carrier construction; and

FIGURE 4 is an enlarged fragmentary side elevation of the left-hand end of FIGURE 2, partly broken away to show the bucket tilting device whereby the forward edge of a suc ceeding bucket is caused to dip beneath the lip on the rearward edge Vof the preceding bucket to prevent loss of materials through the gap therebetween.

Referring tothe drawingsin detail, FGURES l and 2 .Show .abucket `conveyor, generally designated 10, accordingto the invention, consisting generally of a frame structure 12 supporting a chain conveyor unit 14 provided .with'bucket carriers 16 (FIGURE 3) which in turn support material-,conveying buckets 18. The frame structure V1 2 consists ofa pair of elongated channel members 20 .havingfyertical webs .22 (FIGURE 3) in the form of elongated plates with upper ,and lower anges 24 and 2 6 extending toward one another. vThe lower flanges 26 are `interconnected bycross .bars 28 welded thereto, and supporting legs 30 are also welded at their upper ends to the lower flanges 28. The webs 22 are also interconnected at intervals by tubular struts 31, the opposite ends of 2,987,165 Y Patented June V6, `1,961

2 which are welded or otherwise secured thereto (FIGURE 3).

Welded or otherwise secured to the inner sides of the channel member webs 22 (FIGURE 3) are verticallyspaced upper and lower guide tracks 32 and '34 respectively of angle cross-section, commonly known as angle bars, the vertical portions 36 and 38 of which are welded to the webs 22 and the horizontal portions 40` and 42 respectively project inward toward their opposite counterparts parallel to the anges 24 and 26. An elongated wear plate 44 is welded or otherwise secured to the underside of each upper flange 24 and extends therealong parallel to the horizontal upper guide track portion 40;,in spaced relationship therewith.

Bolted, riveted or otherwise secured to the webs 22 near their forward ends are forwardly-projecting parallel horizontal bearing brackets or arms 46 (FIGURES l and 2) in the forward or bearing ends of which'is journaled a conveyork drive shaft 48. Pinned or otherwise drivingly secured to the drive shaft 48 at one end thereof is a drive sprocket 50 (FIGURES l and 3) which is drivingly connected by a conventional drive chain (notshown) to a conventional power source (also not shown), such -as a conventional electric motor andreduction gear box. Such motors and gear boxes are standard equipment in the machine industry and hence require no detailed description.

YKeyed or otherwise drivingly secured to the drive shaft 48 in line with the guide tracks 32 and 34 are two horizontally-spaced conveyor chain driving sprockets 5,2. Bolted, riveted or otherwise secured to the rearward ends of the channel members 29 are spaced parallel rearwardly-projecting bearing supporting brackets 54 v(FIG- URES 1 and 4), each having aparallel-walled guideway 56 in which is slidably mounted a slotted vbearing slide block 58 which is clamped in position-by a clamping bolt 60 after being adjustably moved to that position by an adjusting bolt or screw 6-2 threaded through an angle portion 64 of the bracket 54 against an angle portion 65 of the slide block 58 (FIGURE l') and locked in position bythe usual lock nut. Each of the bearing 4slide blocks 58 at its rearward end is provided with a bearing boss 66 and journaled in the opposed bearing bosses 66 (FIG- URES l, 2 and 4)V is an idler shaft or driven shaft 68. Keyed or otherwise drivingly secured to the driven shaft 68 and disposed in the same spaced parallel planes asfthe conveyor driving sprockets S2 are two conveyor -supporting or idler sprockets 70 of similar construction.

Mounted on the driving and driven sprockets S2 and 7i) respectively of the chain conveyor unit 14 are conveyor chains, generally designated 72. The Yconveyor chains 72 may be of any suitable type, the typeshown being selected -for purposes of illustration and not limitation. Each conveyor chain 72 consists of parallel links 74 (FIGURES 1 and 4) offset laterally at their .rearward ends 76 so that their major portions 78 remain .in substantially the same vertical planes. The thus overlapping links 74 are bored to receive rollervaxles Sil-upon which rollers 82 are rotatably mounted.

For the purpose of tilting the buckets Y as they l.enter the rearward end of the frame structure 12so as to cause the forward edge of each bucket 18 to dipbeneath .the lipped rearward edge of the next preceding'bucket in order to close the gap therebetween, as explained below, the upper guide tracks 32 near the rearward lorleft-hand end of their horizontal portions 40 are each provided with a hump or opstanding projection 84 (FIGURES 2 and 4), the height of which is exaggerated in the drawings tobring it out more clearly. Each hump 84 is disposed near the inner or free edge of each horizontal portion 40 in the path of its respective conveyor chain rollers 82.

Welded, brazed or otherwise firmly and solidly secured and forming therewith the bucket carriers 16 are bucket supporting bars 92 which at their opposite ends are bolted as at 94 to the horizontal arms 90 of the angle brackets 88. In the upper course of the conveyor |unit 14, the

angle brackets 86 depend from the chain links 74 (FIGURE 3) whereas in the lower courses thereof these brackets 86 are of course inverted.

Welded or otherwise secured to each conveyor supporting bar 92 is the bottom wall 96 of a bucket 18, the lateral vside walls 98 of which are inclined (FIGURE 3) relatively to the horizontal and vertical. The forward wall 4-100 of each bucket 18 terminates at its upper edges 1112 in va plain edge, whereas the rearward wall 104 thereof is provided with a rearwardly-extending ange or lip 106 either integral therewith or in the form of an angle mentber 108 having a vertical portion 110 welded or otherwise secured to the rearward end wall 104 (FIGURE 4).

iIn the operation of the invention, let it be assumed that the drive sprocket 50 has been connected to a conventional power source by a conventional sprocket chain (not shown), such as in the manner described above, and that the conveyor chains 72 of the chain conveyor unit 14 have been adjusted to their proper tightness or slackness by the adjusting bolts 62 engaging the bearing slide blocks 58. Let it also be assumed that the conveyor is arranged so that the conveyor chains 72 are so driven as to move in a clockwise direction by clockwise rotation of the drive sprocket 50 and drive shaft 48, causing the chain driving sprockets 52 and the driven sprockets 7 (l likewise to move in clockwise rotation.

Material to be conveyed is dropped into the buckets 18 toward the left-hand end of the conveyor 10 (FIGURE 2) by any suitable means, the particular construction of which is not within the scope of the present invention. The conveyed material, for example, may be deposited in the buckets 18 by a spout or by another conveyor, or may even be poured or shovelled therein` As each bucket 18 is carried upward around the driven or idler sprockets 70, its conveyor chain rollers 82 successively engage and roll upward over the humps 84 located at the entrances to the upper guide rails 32 at the rearward ends thereof (FIGURE 4), causing the forward upper edge 102 of the forward wall 100 of each bucket to dip beneath the rearwardly-extending horizontal lip or llange 106 of the next preceding bucket 18. As the rearmost rollers 82 on the rearward side of the bucket supporting brackets 86 descend from their respective humps 84, the tilted bucket 18 resumes its horizontal position with its forward upper edge 102 beneath the rearwardly-extending lip Y106 of the next preceding bucket 18, thereby closing the gap 112 between them (FIGURE 2), and preventing any materials from dropping through any of the gaps 112. As each bucket 18 arrives at the forward or discharge end of the conveyor 10 (FIGURE 2), it is tilted and thereafter inverted as it passes around the sprockets 52, dumping the contents of the bucket. Meanwhile, however, the next preceding bucket 18 has passed in an inverted condition beneath the sprockets 52 out of the way of the material being dumped from the succeeding bucket 18, so that no interference between buckets occurs. Moreover, on account of the provision of the bucket-tilting humps 84 (FIGURE 4), no clashing occurs between buckets.

In the event that changing of buckets becomes necessary either for repairs or replacement, this can be accomplished merely by removing the bolts 94 (FIGURE 3), inserting another bucket or the same repaired bucket 18, and then replacing the bolts 94. The buckets 18 require no holes in their walls for any purpose and therefore are inherently liquid-tight if such tightness is so desired. On the other hand, if it is desired to drain liquid from the conveyed materials during conveying, this may obviously be done by forming holes in the buckets 18 or by providing buckets 18 of screen or mesh material.

What I claim is:

1. A bucket conveyor comprising an elongated supporting structure having elongated conveyor chain guide members mounted thereon in laterally-spaced substantially parallel relationship,v a plurality of pairs of laterallyspaced conveyor-supporting wheels rotatably mounted on said structure in longitudinally-spaced relationship, a pair of endless conveyor chains mounted on said wheels iu laterally-spaced parallel planes for travel in orbital paths along said guide members, bucket supports secured to said chains at longitudinally-spaced intervals therealong on the inner sides thereof, cross members secured to and extending laterally between said supports, and conveyor buckets having bottom walls secured to said cross members at longitudinally-spaced intervals along said chains, said bucket supports comprising angle brackets having vertical portions secured to and depending from said chains and having horizontal portions extending inwardly from the lower ends of said vertical portions toward the bottom walls of said buckets and connected to said cross members, each bucket having opposite side walls inclined upwardly and outwardly from its respective bottom wall in laterally-overhanging relationship to said angle brackets.

2. A bucket conveyor comprising an elongated supporting structure having elongated conveyor chain guide members mounted therein in laterally-spaced substantially parallel relationship, a plurality of pairs of laterally-spaced conveyor-supporting wheels rotatably mounted on said structure in longitudinally-spaced relationship, a pair of endless conveyor chains mounted on said wheels in laterally-spaced parallel planes for travel in orbital paths along said guide members, bucket supports secured to said chains at longitudinally-spaced intervals therealong on the inner sides thereof; conveyor buckets secured to said bucket supports, said buckets having overlapping edge p0rtions, and means associated with said conveyor chain guide members for tilting the leading edge of one bucket beneath the trailing edge of the adjacent bucket to dispose said edge portions in overlapping relationship.

3. A bucket conveyor according to claim 2, wherein the bucket tilting means includes immediately-adjacent portions of said llaterallyspaced conveyor chain guide members disposed on diierent levels in a direction longitudinally of said chains and wherein the chain adjacent each bucket is provided with rollers simultaneously engageable with said portions of different levels.

4. A bucket conveyor according to claim 3, wherein said portions of different levels include humps on said guide members engageable successively with adjacent rollers.

References Cited in the le of this patent UNITED STATES PATENTS 329,862 Stephens Nov. 3, 1885 381,456 Woodbury Apr. 17, 1888 559,370 Dodge May 5, 1896 583,424 Acklin May 25, 1897 631,718 Hunt et al. Aug. 22, 1899 1,442,292 Pfeilfer Ian. 16, 1923 1,459,253 Plummer June 19, 1923 1,518,951 Andrus Dec. 9, 1924 FOREIGN PATENTS 397,192 Germany June 30, 1924

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